2. rth term of a + 2b, a - b, a 4b,is :

1.	2. rth term of a + 2b, a - b, a 4b,is :
Answer» Explanation : First term = a + 2b difference = a - b - a - 2b = -3b nth term = first term + (n-1)difference rth term = first term + (r-1)difference = a + 2b + (r-1)*(-3b) = a + 2b - 3rb + 3b = a + 5b - 3rb = a + (-3r+5)b Answer : a + (-3r+5)b If you find this answer helpful then like it.

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Explanation : First term = a + 2b difference = a - b - a - 2b = -3b nth term = first term + (n-1)*difference rth term = first term + (r-1)*difference = a + 2b + (r-1)*(-3b) = a + 2b - 3rb + 3b = a + 5b - 3rb = a + (-3r+5)b

Answer : a + (-3r+5)b

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2. rth term of a + 2b, a - b, a 4b,is :

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